TY  - JOUR
T1  - Sodyum Silikoflorürün Mikroyapı ve Isıl Davranışlarının İncelenmesi
TT  - Microstructural Study and Thermal Behavior of Sodium Silicofluoride
AU  - Çakır Arianpour, Aslı
AU  - Arianpour, Farzin
AU  - Ali, Behnam
PY  - 2020
DA  - January
DO  - 10.29137/umagd.572978
JF  - International Journal of Engineering Research and Development
JO  - IJERAD
PB  - Kirikkale University
WT  - DergiPark
SN  - 1308-5506
SP  - 113
EP  - 117
VL  - 12
IS  - 1
LA  - tr
AB  - Sodyumsilikoflorür, Na2SiF6'nın kimyasal formülü ile sonzamanlarda seramik, metalurji ve kimya mühendisliği gibi çeşitli endüstrilerdebirçok uygulama alanı bulan inorganik sentetik bir malzemedir. Bu tozun enönemli kullanımlarından bazıları opal cam-seramik, sırlar ve fritlerdir.Uygulama alanlarının gün geçtikçe artmasına karşı, literatürde sodiumsilikoflorür (SSF) ile ilgili sınırlı sayıda kaynak mevcuttur. Bu araştırmada,ticari bir sodyum silikoflorür tozunun ısıl davranış ve mikroyapı açısındankarakterize edilmiştir. Termal analiz, hava atmosferinde 900 °C’de diferansiyeltermal ve termo gravimetri eğrilerine göre araştırılmıştır. Mikroyapısalanalizler, taneciklerin tane büyüklüğü ve morfolojisini incelemek için taramalıve geçirimli elektron mikroskopları kullanılarak yapılmıştır. Sonuçlar, ticarisodyum silikoflorür malzemesinin, eşlik eden bir endotermik reaksiyonla havada430-600 °C sıcaklık aralığında çözündüğünü göstermiştir. Mikroyapısalkarakterizasyonlarla, incelenen SSF tozunun granüler morfolojisi, altıgenşekilli prizmaların ve ilgili gözeneklerin varlığına da açıklık getirmiştir.
KW  - Sodyum silicoflorür
KW  - Karakterizasyon
KW  - Termal analiz
KW  - Elektron mikroskobu
N2  - Sodiumsilicofluoride, with the chemical formula of Na2SiF6, isan inorganic synthetic material which recently found lots of applications invarious industries such as ceramic, metallurgy and chemical engineering. One ofthe main important usages of this powder is in the production of opalglass-ceramics, glazes and frits. Despite the expansion of its applications,the properties of this material were not investigated deeply elsewhere. In thisresearch, a commercial sodium silicofluoride powder was studied andcharacterized in terms of thermal behavior and microstructure. The thermalanalysis was investigated according to the differential thermal and thermogravimetry curves by heating the material up to 900 °C in air. The microstructuralanalyses were also performed using scanning and transmission electronmicroscopies to study the grain size and morphology of the particles. Theresults showed that this commercial sodium silicofluoride material isdecomposed in the temperature range of 430-600 °C in air by an accompanied endothermicreaction. The microstructural characterizations were also clarified the granularmorphology of the studied SSF powder, existence of the hexagonal shaped prisms andassociated pores.
CR  - Andreeva, V. & Fekeldjiev, G. (1986) Use of nonconventional raw materials in ceramic production. Ceramics International, 12, 229-235.
CR  - Arai, T. & Adachi, S. (2011) Mn-activated Na2SiF6 red and yellowish-green phosphors: A comparative study. Journal of Applied Physics, 110, 063514.
CR  - Ciavatta, L., Iijliano, M. & Porto, R. (1988) Fluorosilicate equilibria in acid solution, Polyhedron, 7 (18), 1773-1779.
CR  - Coyle, G. J., Tsang, T. & Adler, I. (1981) XPS studies of surface damages of transition metal fluorosilicates under argon ion bombardment. Surface Science, 112, 197-205.
CR  - Hattab, F. N. (1987) Direct determination of fluoride in selected dental materials. Dent. Mater., 3, 67-70.
CR  - Jeong, H. L. & Huh, Y.D. (2010) Synthesis of hexagonal prisms and hexagonal plates of Na2SiF6 microcrystals. Materials Letters, 64, 1816-1818.
CR  - Khan, M. S., Shahzadi, P., Alam, S., Javed, K., Shaheen, F., Naqvi, J. & Shahnaz, A. (2015) Development of heat resistant borosilicate glass doped with sodium silico fluoride compound. Journal of Chemistry and Materials Research, 4, 1, 13-18.
CR  - Kumar, M., Nani Babu, M., Mankhand, T.R. & Pandey, B.D. (2010) Precipitation of sodium silicofluoride (Na2SiF6) and cryolite (Na3AlF6) from HF/HCl leach liquors of alumino-silicates, Hydrometallurgy, 104, 304-307.
CR  - Smith, G. E. (1985) Toxicity of fluoride-containing dental preparations: A review. The Science of the Total Environment, 43, 41-61.
CR  - Toure, A. O., Keinde, D., Sambe, F. M., Joseph, M. & Diop C. G. M. (2017) Use of a fluoride waste in the raw mix for clinker manufacturing. American-Eurasian Journal of Scientific Research, 12, 1, 1-6.
CR  - Vanka, M. & Vachuska, J. (1980) Thermal decomposition of sodium hexafluorosilicate. Thermochimica Acta, 36, 387-391.
CR  - Yeo, B. E., Cho, Y. S.& Huh, Y. D. (2016) Synthesis and photoluminescence properties of a red-emitting phosphor K2SiF6:Mn4+ for use in three-band white LED applications, Optical Materials, 51, 50-55.
UR  - https://doi.org/10.29137/umagd.572978
L1  - https://dergipark.org.tr/en/download/article-file/947755
ER  -